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Role of Loading on Head Stability and Effective Neck Stiffness and Viscosity by Martin Simoneau; Marc Denninger; Timothy C. Hain is a Medicine article available to read on EtoBox.

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This experiment tests the hypothesis that loading the head would increase head stability. In particular, we hypothesized that an arrangement of the head so that muscle activation is required to counteract a load would significantly increase effective neck stiffness and viscosity, which would be associated with lower peak head angular velocity following abrupt force perturbations applied to the head. Seven young healthy subjects had their head loaded (preload) using a weight/pulley apparatus. Then, the head was pulled either forward or backward by dropping an additional weight onto the preload, causing an impulse of force followed by an increase in load. We recorded the applied force and head angular velocity. Neck viscoelastic properties as a function of loading were estimated by fitting experimental data to a second-order mathematical model of the head biomechanics. Across preloads varying from 2.22 to 8.89 N, peak head angular velocity decreased by 18.2% for the backward and by 19.9% for forward perturbations. As preload increased, simulated effective neck stiffness and viscosity significantly increased leading to lower peak angular velocity. These results demonstrated that loadi

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Author

Martin Simoneau; Marc Denninger; Timothy C. Hain

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0021-9290)

Published

2008

Language

EN

Field

Medicine (Health Sciences)